NEW YORK -- NBC Entertainment president Robert Greenblatt on Monday confirmed that the newly announced seventh season of 30 Rock will be its last.

Speaking to Madison Avenue ad buyers at the network's upfront presentation in New York, the executive confirmed speculation that the upcoming shortened season would feature 13 episodes and be its last, culminating with an hourlong series finale.

"We think the world of Tina Fey and think she's a comic genius," Greenblatt said. "We hope she has a home at NBC for years to come."The announcement comes a day after Greenblatt told reporters during a conference call that a decision had not yet been made on the whether or not the seventh season would be its last.

Despite awards-season recognition, the Tina Fey and Alec Baldwin Thursday night comedy has seen its ratings erode, like most broadcast fare, despite high-profile guest stars and a second live episode, which notched a 1.6 in the demo -- a far cry from the 3.1 mark for its 2010 live installment. Baldwin has been vocal about his status on the show, and the network confirmed he'd return for the final season.